.my_toast {
    box-sizing: border-box;
    padding: 30rpx;
   position: absolute;
   z-index: 1000;
   max-width: 70%;
   background: rgba(40, 40, 40, 0.75);
   left: 0;
   right: 0;
   top: 35%;
   margin: 0 auto;
   color: #fff;
   text-align: center;
   font-size: 30rpx;
   border-radius: 12rpx;
}